Uppercase to Lowercase Converter & Online Text Case Tool

In passwords, uppercase refers to capital letters (A, B, C, etc.) and lowercase refers to small letters (a, b, c, etc.). Most security systems require a combination of uppercase and lowercase letters because passwords are case-sensitive, making them significantly harder to crack via brute-force attacks (for example, "PassWord123" is treated as completely distinct from "password123").

You can convert an uppercase character to lowercase by typing its small letter equivalent, using a keyboard shortcut like Shift + F3 in Microsoft Word, using code functions such as JavaScript's .toLowerCase() or Python's .lower(), or by pasting your character into our online case converter tool and clicking "lower case".

To convert all caps to lowercase, paste your all-caps text into the Proper Case Converter editor above and click the "lower case" button (or press Alt + L). The tool instantly changes all capital letters into lowercase while keeping all punctuation, numbers, and spacing intact.

Uppercase to lowercase is the transformation process of converting capital letters (A-Z) into small letters (a-z). It is commonly used to normalize search queries, clean up shouting text, sanitize email addresses and URLs, or standardize text datasets.

Examples of 4-character passwords using uppercase, lowercase, numbers, and symbols include: "aB3!", "X7#q", "k9$M", and "P2@w". While useful for simple PIN codes, cybersecurity standards recommend using passwords of at least 12–16 characters with mixed casing for secure accounts.

Examples of uppercase letters include individual capital letters like "A", "B", "C", full capital words like "PROPER CASE CONVERTER", and standard acronyms such as "NASA", "HTML", "CSS", and "API".

On your computer keyboard, ensure the "Caps Lock" key is toggled off (indicator light is turned off). In Microsoft Word or Google Docs, select your text and go to Format > Text > Capitalization > Lowercase (or press Shift + F3). On mobile phones (iPhone and Android), tap the Shift / Arrow key to toggle between uppercase and lowercase input modes.

The terms "uppercase" and "lowercase" originate from traditional letterpress printing shops. Typesetters kept individual metal type pieces in two compartmentalized wooden drawers: the capital letters were stored in the higher or "upper case" drawer, while the more frequently used small letters were kept in the convenient "lower case" drawer.

To convert uppercase text to lowercase online, visit Proper Case Converter, paste your capital text into the input box, and click the "lower case" button. Your text converts in real time with 0ms latency directly in your browser without uploading your data to external servers.

To write in uppercase, hold the Shift key while pressing a letter key (e.g., Shift + A = A) or enable the Caps Lock key for continuous capitals. To write in lowercase, type the letter keys normally without holding Shift and ensure Caps Lock is disabled.

Lowercase refers to the smaller letterforms of an alphabet (e.g., a, b, c, d, e) as opposed to capital uppercase letters (A, B, C, D, E). Lowercase letters form the vast majority of body text in books, articles, emails, and websites.

Uppercase and lowercase are collectively referred to as "letter case", "letter casing", or in classical typography, "majuscule" (uppercase) and "minuscule" (lowercase). A writing system that uses both letter cases is called a bicameral script.

To make lowercase text uppercase, paste your text into the Proper Case Converter tool and click the "UPPER CASE" button. Every small letter will immediately transform into its capital letter counterpart.

You can change lowercase to uppercase by clicking the "UPPER CASE" button in our online converter, using the keyboard shortcut Alt + U, pressing Shift + F3 in word processors, or using programming methods like .toUpperCase().

To convert uppercase to lowercase, paste your capital text into the Proper Case Converter editor and click the "lower case" button (or press Alt + L). The tool converts all uppercase characters into lowercase instantly.

To turn lowercase to uppercase, paste your text into the converter box and select the "UPPER CASE" button. All small characters (a-z) will instantly turn into capital letters (A-Z).

To change all uppercase to lowercase, insert your text into Proper Case Converter and click "lower case". The tool handles paragraphs, lines, and articles of any length in 0 milliseconds.

To change all lowercase to uppercase, paste your entire document into the editor and click "UPPER CASE". All lowercase letters across the text will convert into full uppercase capitals.